190 Driving mode Differential lock Engaging the differential lock Important safety notes Engage the differential lock when required, e.g. when driving off-road or on slippery road surfaces. The differential locks can also be engaged/ disengaged while driving, without disengag- ing the clutch, but only if the wheels are not spinning. Driving mode G WARNING If you activate the automatic operating mode while driving off-road or with the differential lock engaged, the electronic management system may perform unwanted gear changes. Due to the interruption in the tractive power, the vehicle can roll backwards on uphill slopes, for instance. There is a risk of an acci- dent.
Always activate the manual operating mode when driving off-road or with the differential lock engaged. The individual differential locks can only be engaged in sequence. X Turn the differential lock switch to position 1 . The transfer case inter-axle lock is engaged. A symbol appears in the on-board computer to indicate locking and the i indicator lamp lights up in the instrument cluster. X Turn the differential lock switch to position 2 . The rear-axle differential lock is also engaged. A symbol appears in the on-board computer to indicate locking and the i indicator lamp lights up in the instrument cluster.
G WARNING If you engage the differential locks when driv- ing on a firm, high-traction surface, the steer- ability of the vehicle is severely impaired. You could lose control of the vehicle, especially when activating on a bend. There is a risk of an accident. Disengage the differential locks immediately on a firm, high-traction surface. X Turn the differential lock switch to position 3 . The front-axle differential lock is also engaged. ABS is deactivated. A symbol appears in the on-board computer to indi- cate locking and the i indicator lamp lights up in the instrument cluster. Vehicles with Telligent ® automatic gear- shift:
in particularly difficult driving condi- tions, switch to manual driving program M . This will enable you to avoid any undesired interruptions to the tractive power that may occur with automatic gearshifting. In difficult terrain you must manually engage and release the clutch pedal. In order to do this, the clutch pedal must be folded out ( Y page 181). Disengaging the differential lock X Turn the differential lock switch to position g . The differential locks are disengaged. The differential lock indicator in the on-board computer display and the i indicator lamp go out. ABS is reactivated.